CN206365090U - It is a kind of to reduce the LED failure breaking circuit of quiescent current - Google Patents
It is a kind of to reduce the LED failure breaking circuit of quiescent current Download PDFInfo
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- CN206365090U CN206365090U CN201621488772.5U CN201621488772U CN206365090U CN 206365090 U CN206365090 U CN 206365090U CN 201621488772 U CN201621488772 U CN 201621488772U CN 206365090 U CN206365090 U CN 206365090U
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Abstract
It is a kind of to reduce the LED failure breaking circuit of quiescent current, belong to lighting field.Including LED failure breaking circuit, linear constant current circuit module and LED load module, its LED load module is made up of n LED branch path, and each LED branch paths include m LED；Linear constant current circuit module is provided with n linear constant current circuit, the connection corresponding with a LED branch path of each linear constant current circuit；Provided with an electronic switch in LED failure breaking circuit module.It sets an electronic switch in linear constant current circuit reference voltage resource loop, when LED failure breaking circuit works, electronic switch directly ends, the reference voltage resource loop of linear constant current circuit is thoroughly cut off, so that linear constant current circuit is in complete idle state, it can accomplish that the quiescent current consumed during failure is very small, it is sufficient to which failure is smoothly recognized by vehicle body main control unit.Design and manufacture field available for automobile LED car light controller.
Description
Technical field
The utility model belongs to lighting field, more particularly to a kind of control circuit of the automobile lamp of use LED/light source.
Background technology
The car light of automobile mainly plays illumination and signal function.Especially it is located at the light that automotive front end car light is sent, Ke Yizhao
Road conditions in front of bright car body, allow driver safely to be driven a vehicle in night.
LED technology passes through the development advanced by leaps and bounds decades, because it has power low, efficiency high, the spy such as photochromic high-quality
Point, its application is more and more extensive, particularly in automobile lamp lighting field.
Existing LED car lamp, in particular for the bright automobile headlamp of vehicle front lighting (being commonly called as headlight), generally using many
LED strip joins, and constitutes one group of LED load (also known as lamp string or lamp string branch road).Whole headlight can be using as one group or array
LED load, to constitute the illuminating source of whole headlight.
Using data of publication of application as on December 02nd, 2015, application publication number is the A of CN 105120556 Chinese invention patent
Exemplified by application, in the application for a patent for invention, a kind of " using HVLED low heating power consumption car light electronic circuit ", its light are disclosed
Source module L, exactly by plurality of LEDs connect after (shown in its Figure of description 1) for constituting.But use this circuit knot
The car light of structure in actual use, once in constituting the plurality of LEDs of this group of LED load branch road series connection, there is LEDs damage
It is bad, the whole normal work of this group of LED load can be influenceed and lighted.
In this regard, authorized announcement date is on 08 12nd, 2015, Authorization Notice No. is practical for the U of CN 204559967 China
In new patent, a kind of " automobile LED light fixture short interruption turning off system " is disclosed, the positive pole of its lamp group of each lamp string branch road connects electricity
Source, negative pole connects triode Q colelctor electrode, and each triode Q colelctor electrode connects the second Xiao Te diodes D2 positive pole, each lamp string branch road
On triode Q base stage be connected, the second Xiao Te diode D2 output ends are sentenced by respective short-circuit decision circuitry and open circuit
Deenergizing connects the input of each self-corresponding signal processing circuit, and each signal processing circuit connects each lamp through lamp string branch road control circuit
The base stage of the triode of string branch road, when the one of light emitting diode of any lamp string branch road occurs breaking or short disconnected, control
Triode Q on each lamp string branch road turns off LED all on the lamp string branch road.In the technical scheme, when any one LED hairs
During raw breaking or short disconnected failure, the triode Q being serially connected in the lamp string branch road disconnects, and cuts off all LED on the lamp string branch road
Power supply, and then the LED in each lamp string branch road can be controlled all off in time.
In order that the electric current for flowing through LED is constant, it is ensured that the uniformity and stability of LED brightness, present LED car lamp is
Through more using power supply of the constant-current source as foregoing LED load.
The now common specific circuit of LED failure breaking circuit is exemplified by shown in Fig. 1, and it sets failure breaking circuit
In the base stage of the reference voltage point of linear constant current.
Failure detector circuit is detected after LED open faults, causes failure breaking circuit to work, final fault breaking circuit
Afterbody switch transistor T R5 colelctor electrode be connected in linear constant current circuit at reference voltage point A, reference voltage is conducting to
Ground, even if reference voltage is approximately and 0V.
The shortcoming of this way is：Even if because afterbody switch transistor T R5 is conducting to ground, due to triode inner bulk two
The presence of pole pipe, still has 0.2V or so voltage, cause in linear constant current circuit reference voltage to be conducting to not thoroughly, so
The shut-off of LED operation circuit is not thorough in the case of failure, can so make LED bright and power port malfunction quiescent currents slightly
>The 10mA order of magnitude, the main control unit or main control module that automobile is not easy to sometimes (is also known as in the industry vehicle body main control list
Member) identification failure.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of LED failure shut-off electricity that can reduce quiescent current
Road.It is between power supply and the reference voltage resource loop of linear constant current circuit, there is provided an electronic switch, when event occurs for LED
During barrier, the work of LED failure breaking circuit, output control signal makes electronic switch directly end, by the reference of linear constant current circuit
Voltage resource loop is thoroughly cut off so that the reference voltage resource loop of linear constant current circuit does not have electric current to flow through, then linear constant current electricity
Road is in complete idle state, it is possible to accomplish that the quiescent current consumed during LED failure is very small, it is sufficient to quilt
Vehicle body main control unit smoothly recognizes failure.
The technical solution of the utility model is：Offer is a kind of to reduce the LED failure breaking circuit of quiescent current, including defeated
Enter to filter reverse-connection preventing circuit module, LED failure breaking circuit module, linear constant current circuit module and LED load module, its feature
It is：
Described LED load module is at least made up of n LED branch path, and each LED branch paths at least include m LED,
Wherein n is more than 1, m and is more than 1；
Described linear constant current circuit module is provided with n linear constant current circuit, each linear constant current circuit with one
LED branch paths correspondence is connected；
In described LED failure breaking circuit module, an electronic switch is provided with；
Described electronic switch, is arranged between input filter reverse-connection preventing circuit module and linear constant current circuit module；
The first end or input of the electronic switch, connection corresponding with input filter reverse-connection preventing circuit module；Electronic cutting
The second end closed or output end, connection corresponding with linear constant current circuit module；The control end of electronic switch, is turned off with LED failure
Circuit module correspondence is connected；
First end or input connection of the VCC power supplys through input filter reverse-connection preventing circuit module and electronic switch；
The output end of the linear constant current circuit module is connected with LED load module；
The input of the LED failure breaking circuit module and each LED branch path in LED load module are corresponding respectively
Connection；
The output end connection corresponding with the control end of electronic switch of the LED failure breaking circuit module.
Specifically, described LED load is at least made up of 2 LED branch paths, each LED branch paths at least include 2
LED strip connection is constituted.
Specifically, described LED failure breaking circuit, is provided with an electronic switch；Described electronic switch is serially connected in
Between the output end of input filter reverse-connection preventing circuit module and the input of linear constant current circuit module；Or, described electronics
Switch is serially connected between the output end of input filter reverse-connection preventing circuit module and the reference voltage stabilizing point of linear constant current circuit module.
Further, described electronic switch is switch triode, controllable silicon, relay or controlled electric switch.
Further, described electronic switch is the first triode TR1, the first triode TR1 base stage and LED
The output end connection of failure breaking circuit module, the emitter stage of the first triode TR1 is prevented through pull-up resistor and input filter
The output end connection of reversal connection circuit module, the colelctor electrode of the first triode TR1 and the input of linear constant current circuit module
Or the reference voltage stabilizing point correspondence of linear constant current circuit module is connected.
LED failure breaking circuit module described in it includes the first pull-up resistor R1, the second pull-up resistor R2, the one or three pole
Pipe TR1, the 5th triode TR5, the 6th triode TR6, diode D3, pull down resistor R10 and filter capacitor C3；
Wherein, after the 5th triode TR5 base stage is connected with the 6th triode TR6 emitter stage, through the first pull-up resistor
R1 is connected with the output end of input filter reverse-connection preventing circuit module, the 5th triode TR5 colelctor electrode and the first triode TR1's
It is connected after base stage connection through the second pull-up resistor R2 with the output end of input filter reverse-connection preventing circuit module, the 5th triode TR5
Emitter stage be grounded through diode D3 and pull down resistor R10；6th triode TR6 grounded collector, the 6th triode TR6's
Base stage is connected through diode with the output end of linear constant current circuit module.
Compared with the prior art, the utility model has the advantages that：
One controlled electronic switch is set in the reference voltage resource loop of linear constant current circuit module, when some LED goes out
After existing open fault, LED failure breaking circuit module action, output control signal causes controlled electronic switch to disconnect, will be linear
The reference voltage loop of constant-current circuit module is thoroughly cut off, and linear constant current circuit module is in complete idle state so that
The quiescent current that linear constant current circuit module is consumed during LED load failure is very small, has both avoided linear permanent in the prior art
Reference voltage is conducting to halfway drawback in current circuit, in turn ensure that LED load failure can be by the main control circuit of automobile
(also known as vehicle body main control unit) smoothly identification, helps to realize quick, the correct identification of LED load failure.
Brief description of the drawings
Fig. 1 is the schematic diagram of the LED failure breaking circuit of traditional approach；
Fig. 2 is the module composition schematic diagram of the utility model LED failure breaking circuit；
Fig. 3 is the specific line map of the utility model LED failure breaking circuit.
In figure, 1 is input filter reverse-connection preventing circuit module, and 2 be LED failure breaking circuit module, and 3 be linear constant current circuit
Module, 4 be LED load module.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings.
In Fig. 2, the technical solution of the utility model can reduce the LED failure breaking circuit of quiescent current there is provided a kind of,
Including input filter reverse-connection preventing circuit module 1, LED failure breaking circuit module 2, linear constant current circuit module 3 and LED load mould
Block 4, its inventive point is：
In described LED failure breaking circuit module, an electronic switch is provided with；
Described electronic switch, is arranged between input filter reverse-connection preventing circuit module and linear constant current circuit module；
The first end or input of the electronic switch, connection corresponding with input filter reverse-connection preventing circuit module；Electronic cutting
The second end closed or output end, connection corresponding with linear constant current circuit module；The control end of electronic switch, is turned off with LED failure
Circuit module correspondence is connected；
First end or input connection of the VCC power supplys through input filter reverse-connection preventing circuit module and electronic switch；
The output end of the linear constant current circuit module is connected with LED load module；
The input of the LED failure breaking circuit module and each LED branch path in LED load module are corresponding respectively
Connection；
The output end connection corresponding with the control end of electronic switch of the LED failure breaking circuit module.
As seen from the figure, with linear constant current electricity after VCC power supplys are delivered to electronic switch through input filter reverse-connection preventing circuit module
Road module connection, the output end of linear constant current circuit module is connected with LED load module, it is powered.
When described LED load module is working properly, described electronic switch is in " conducting " connection status, described
VCC power supplys pass through input filter reverse-connection preventing circuit module and electronic switch, connect with the input of the linear constant current circuit module
Connect, to realize that the electric current that LED is flowed through on n bar branch roads is identical；
After " open circuit " failure occurs in some LED in any LED branch paths, LED failure breaking circuit module action is defeated
Go out control signal so that electronic switch is in " cut-off " off state, by input filter reverse-connection preventing circuit module and linear constant current electricity
Electrical connection and thoroughly cut-out between the module reference voltage loop of road, linear constant current circuit module can not work, and cause described
LED load module is thoroughly " power-off ".
LED failure breaking circuit described in technical solutions of the utility model, in the reference electricity of power supply and linear constant current circuit
Between potential source loop, there is provided an electronic switch, when LED failure, LED failure breaking circuit work, LED failure is closed
The control signal of deenergizing output makes electronic switch directly end, and the reference voltage resource loop of linear constant current circuit is thoroughly cut
Disconnected so that the reference voltage resource loop of linear constant current circuit does not have electric current to flow through, then linear constant current circuit is in and not worked completely
State, it is possible to accomplish that the quiescent current consumed during LED failure is very small, it is sufficient to suitable by vehicle body main control unit
Profit identification failure.
The technical solution of the utility model, the reference electricity of linear constant current circuit module is controlled by a controlled electric switch
The break-make on road is pushed back, after there is open fault in some LED, LED failure breaking circuit module action, described controlled electric switch
In cut-off off state, the reference voltage loop of linear constant current circuit module is thoroughly cut off, linear constant current circuit module
Reference voltage resource loop does not have electric current to flow through, and linear constant current circuit module is in complete idle state so that LED load event
The quiescent current that linear constant current circuit module is consumed during barrier is very small, to ensure LED load failure by vehicle body main control unit
Smoothly identification.
In Fig. 3, the LED failure breaking circuit of quiescent current can be reduced disclosed in technical solutions of the utility model, mainly
It is made up of following functional module:Functional module one：Input filter reverse-connection preventing circuit 1；Functional module two：LED failure is turned off
Circuit 2；Functional module three：Linear constant current circuit 3, functional module four：LED load 4.
Wherein, functional module two is main by 2 pull-up resistors R1, R2,2 PNP triodes TR1, TR6,1 pole of NPN tri-
Pipe TR5,1 diode D3,1 pull down resistor R10 and 1 filter capacitor C3 composition.
As seen from the figure, described LED load is at least made up of 2 LED branch paths, and each LED branch paths at least include 2
LED strip connection is constituted.
Further, described controlled electronic switch be the first triode TR1, the base stage of the first triode TR1 with
The output end connection of LED failure breaking circuit module, the emitter stage of the first triode TR1 is through pull-up resistor and input filter
The output end connection of reverse-connection preventing circuit module, the colelctor electrode of the first triode TR1 and the reference of linear constant current circuit module
Voltage stabilizing point correspondence is connected.
Described LED failure breaking circuit module includes the first pull-up resistor R1, the second pull-up resistor R2, the first triode
TR1, the 5th triode TR5, the 6th triode TR6, diode D3, pull down resistor R10 and filter capacitor C3；
Wherein, after the 5th triode TR5 base stage is connected with the 6th triode TR6 emitter stage, through the first pull-up resistor
R1 is connected with the output end of input filter reverse-connection preventing circuit module, the 5th triode TR5 colelctor electrode and the base of switch triode
It is connected after the connection of pole through the second pull-up resistor R2 with the output end of input filter reverse-connection preventing circuit module, the 5th triode TR5's
Emitter stage is grounded through diode D3 and pull down resistor R10；6th triode TR6 grounded collector, the 6th triode TR6 base
Pole is connected through diode with the output end of linear constant current circuit module.
Described LED failure breaking circuit, sets a switch triode TR1 to be connected on linear constant current circuit module references
In the loop of voltage source, controlled electronic switch is served as；When described LED failure breaking circuit module action, switch triode
TR1 directly ends, and the reference voltage resource loop of linear constant current circuit module is cut off, and reference voltage resource loop does not have electric current stream
Cross, then linear constant current circuit module is in complete idle state so that linear constant current circuit mould during LED load module failure
The quiescent current that block is consumed is very small, to ensure that LED load failure is smoothly recognized by vehicle body main control unit.
Further, described controlled electronic switch is switch triode, controllable silicon, relay or controlled electric switch.
Power supply VCC is introduced into the anti-reverse part of the input filter of functional module one, by the TVS pipe TVS1 and the filter that switch to ground
After ripple electric capacity C1, C2, counnter attack diode D1 positive pole is flowed into, electric current flows out from D1 negative pole, by the failure of functional module two
The linear constant current circuit of functional module three, the linear constant current of functional module three electricity are reached after switch triode TR1 in breaking circuit
Road is connected power supply with the LED load of functional module four.
In the linear constant current circuit of functional module three, electric current forms linear constant current circuit by resistance R3, diode D2, D4
With reference to source of stable pressure (assuming that failure breaking circuit does not work, switch triode TR1 conductings), voltage stabilizing point A and the current limliting electricity of source of stable pressure
Hinder R4, R5, R6 ... Rn and be connected (assuming that LED branch roads have n branch).
By taking wherein a certain branch road as an example, current-limiting resistance R4 is connected with the pliotron TR2 of linear constant current base stage, work(
Rate triode TR2 emitter stage is connected with 1 flows resistance R7, and the flows resistance R7 other end is connected to ground.Pliotron
TR2 colelctor electrode is connected with LED negative pole.Current-limiting resistance R4, R5, R6 of each branch road one end link together, the other end
Pliotron TR2, TR3, TR4 of each branch road base stage, the emitter stage point of the pliotron of each branch road are connected respectively
Not Lian Jie flows resistance R7, R8, a R9 to ground, the colelctor electrode of the pliotron of each branch road connects each branch road respectively
LED negative poles, to reach that the LED current on n bar branch roads is identical (because n bars branch road is all referring to same voltage stabilizing point A).Functional module
The LED positive poles that LED strip is loaded in four are connected to D1 negative pole, formed LED+ to LED-loop, foregoing circuit constitutes linear perseverance
Current circuit.
The LED negative poles of each branch road LED strip of the LED load of functional module four connect the negative pole of 1 diode, with LED1-
Exemplified by string, LED1- is connected to D5 negative pole, D6, D7 ..., Dn by that analogy, the positive pole of all diodes is all connected in parallel on
After together, formed " with door ", the output of " with door " is connected PNP triode TR6 base stage, and PNP triode TR6 base stage is same
When one filter capacitor C3 of connection to ground, PNP triode TR6 colelctor electrode is connected to ground, and PNP triode TR6 emitter stage is passed through
Cross the central connection point and NPN tri- of the negative pole that a current-limiting resistance R1 is pulled upward to diode D1, current-limiting resistance R1 and triode TR6
Pole pipe TR5 base stage is connected, and NPN triode TR5 emitter stage is connected with diode D3 positive pole, and diode D3 negative pole is with
Pull-up resistor R10 one end is connected, and the R10 other end is connected to the ground；NPN triode TR5 colelctor electrode is by a pull-up resistor
R2 is connected to diode D1 negative pole, pull-up resistor R2 and NPN triode TR5 central connection point and PNP triode TR1 base
Extremely it is connected, PNP triode TR1 is connected in the middle of R3 to D2, D3 mu balanced circuit, forms a controlled electronic switch.
Shown in Fig. 3, during LED normal works, the LED negative poles of each branch road have voltage high level, by two
Pole pipe composition with door (have 0 must 0, it is complete 1 just 1 logic) after, C points output high level, triode TR6 is due to C point voltages and D points
Voltage all enters cut-off state for high level (i.e. without pressure difference), then D points voltage is high level, so that triode TR5 is turned on,
After conducting, voltages of the power supply VCC after diode D1 passes through E points after resistance R2, diode D3 and resistance R10 partial pressures, partial pressure
Voltage is low, and triode TR1 is turned on due to emitter stage B points voltage higher than base stage E point voltages, so after triode TR1 conductings,
The reference voltage loop (R3 to D2, D4) of the linear constant current circuit of functional module three is connected, linear constant current circuit work is supplied electricity to
LED strip.
When there is LEDs open circuit, the LED negative poles output 0V low levels for this branch road of opening a way, according to diode group and door
Logic speciality, C points output low level, triode TR6 emitter stage D points voltage is higher than base stage C point voltages, so TR6 is turned on
To ground；Then D points are 0V low levels, triode TR5 cut-offs；Then E points are the high level for being equivalent to D1 negative poles, so TR1 ends；
The reference voltage loop (R3 to D2, D4) of the linear constant current circuit of functional module three is thoroughly cut off after TR1 cut-offs, linear constant current electricity
Road can not work, the LED strip also current supply circuit without linear constant current circuit.
Compared with the prior art shown in Fig. 1, the LED failure breaking circuit of the technical program has changed working method
Point of penetration, as can see from Figure 3：One switch triode TR1 is series at linear constant current circuit reference voltage source by it
(i.e. resistance R3 is flowed through in diode D2, resistance D4 to ground loop) serves as controlled electronic switch in loop, when fail close power-off
When road works, this switching tube of switch triode TR1 directly ends, and the reference voltage resource loop of linear constant current circuit is cut off,
Because reference voltage resource loop does not have electric current to flow through, then linear constant current circuit is in complete idle state, it is possible to do
The quiescent current consumed during to LED failure is very small, it is sufficient to recognized by vehicle body main control unit.
Because the utility model is provided with an electronic switch in the reference voltage resource loop of linear constant current circuit, when event
When hindering breaking circuit work, this electronic switch directly ends, and the reference voltage resource loop of linear constant current circuit is thoroughly cut off,
So that reference voltage resource loop does not have electric current to flow through, then linear constant current circuit is in complete idle state, it is possible to do
The quiescent current consumed during to failure is very small, it is sufficient to smoothly recognize failure by vehicle body main control unit.
The utility model can be widely used for design and the manufacture field of automobile LED car light controller.
Claims (6)
1. a kind of can reduce the LED failure breaking circuit of quiescent current, including input filter reverse-connection preventing circuit module, LED failure
Breaking circuit module, linear constant current circuit module and LED load module, it is characterized in that：
Described LED load module is at least made up of n LED branch path, and each LED branch paths at least include m LED, wherein n
It is more than 1 more than 1, m；
Described linear constant current circuit module is provided with n linear constant current circuit, and each linear constant current circuit is divided with a LED
Branch road correspondence is connected；
In described LED failure breaking circuit module, an electronic switch is provided with；
Described electronic switch, is arranged between input filter reverse-connection preventing circuit module and linear constant current circuit module；
The first end or input of the electronic switch, connection corresponding with input filter reverse-connection preventing circuit module；Electronic switch
Second end or output end, connection corresponding with linear constant current circuit module；The control end of electronic switch, with LED failure breaking circuit
Module correspondence is connected；
First end or input connection of the VCC power supplys through input filter reverse-connection preventing circuit module and electronic switch；
The output end of the linear constant current circuit module is connected with LED load module；
The input of the LED failure breaking circuit module with each LED branch path in LED load module is corresponding respectively connects
Connect；
The output end connection corresponding with the control end of electronic switch of the LED failure breaking circuit module.
2. the LED failure breaking circuit of quiescent current can be reduced according to described in claim 1, it is characterized in that described LED is born
It is loaded onto and is made up of less 2 LED branch paths, each LED branch paths at least includes 2 LED strips connection and constituted.
3. the LED failure breaking circuit of quiescent current can be reduced according to described in claim 1, it is characterized in that the LED failure stated
Breaking circuit, is provided with an electronic switch；Described electronic switch is serially connected in the output of input filter reverse-connection preventing circuit module
Between end and the input of linear constant current circuit module；Or, described electronic switch is serially connected in input filter reverse-connection preventing circuit
Between the output end of module and the reference voltage stabilizing point of linear constant current circuit module.
4. the LED failure breaking circuit of quiescent current can be reduced according to described in claim 1, it is characterized in that described electronic cutting
Close as switch triode, controllable silicon, relay or controlled electric switch.
5. the LED failure breaking circuit of quiescent current can be reduced according to described in claim 1, it is characterized in that described electronic cutting
Close as the first triode TR1, the base stage of the first triode TR1 is connected with the output end of LED failure breaking circuit module, institute
The emitter stage for stating the first triode TR1 is connected through pull-up resistor with the output end of input filter reverse-connection preventing circuit module, and described
One triode TR1 colelctor electrode and the input of linear constant current circuit module or the reference voltage stabilizing point pair of linear constant current circuit module
It should connect.
6. the LED failure breaking circuit of quiescent current can be reduced according to described in claim 1 or 5, it is characterized in that described LED
Failure breaking circuit module includes the first pull-up resistor R1, the second pull-up resistor R2, the first triode TR1, the 5th triode
TR5, the 6th triode TR6, diode D3, pull down resistor R10 and filter capacitor C3；
Wherein, after the 5th triode TR5 base stage is connected with the 6th triode TR6 emitter stage, through the first pull-up resistor R1 with
The output end connection of input filter reverse-connection preventing circuit module, the 5th triode TR5 colelctor electrode and the first triode TR1 base stage
It is connected after connection through the second pull-up resistor R2 with the output end of input filter reverse-connection preventing circuit module, the 5th triode TR5 hair
Emitter-base bandgap grading is grounded through diode D3 and pull down resistor R10；6th triode TR6 grounded collector, the 6th triode TR6 base stage
It is connected through diode with the output end of linear constant current circuit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621488772.5U CN206365090U (en) | 2016-12-30 | 2016-12-30 | It is a kind of to reduce the LED failure breaking circuit of quiescent current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621488772.5U CN206365090U (en) | 2016-12-30 | 2016-12-30 | It is a kind of to reduce the LED failure breaking circuit of quiescent current |
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| Publication Number | Publication Date |
|---|---|
| CN206365090U true CN206365090U (en) | 2017-07-28 |
Family
ID=59377903
Family Applications (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471656A (en) * | 2018-06-01 | 2018-08-31 | 华域视觉科技(上海)有限公司 | A kind of light source driving circuit and lighting device |
| CN109515350A (en) * | 2018-11-13 | 2019-03-26 | 深圳市路畅科技股份有限公司 | A kind of protection circuit |
| CN110176748A (en) * | 2019-05-29 | 2019-08-27 | 新里程医用加速器(无锡)有限公司 | A kind of protection ring control system |
-
2016
- 2016-12-30 CN CN201621488772.5U patent/CN206365090U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471656A (en) * | 2018-06-01 | 2018-08-31 | 华域视觉科技(上海)有限公司 | A kind of light source driving circuit and lighting device |
| CN108471656B (en) * | 2018-06-01 | 2023-12-05 | 华域视觉科技(上海)有限公司 | Light source driving circuit and lighting device |
| CN109515350A (en) * | 2018-11-13 | 2019-03-26 | 深圳市路畅科技股份有限公司 | A kind of protection circuit |
| CN109515350B (en) * | 2018-11-13 | 2021-09-24 | 深圳市路畅科技股份有限公司 | Protective circuit |
| CN110176748A (en) * | 2019-05-29 | 2019-08-27 | 新里程医用加速器(无锡)有限公司 | A kind of protection ring control system |
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Address after: 201821 Yecheng Road, Jiading District, Jiading District, Shanghai Patentee after: Hua Yu vision technology (Shanghai) Co., Ltd. Address before: 201821 Yecheng Road, Jiading District, Jiading District, Shanghai Patentee before: Xiaoxi Car Lights Co., Ltd., Shanghai |